Do whatever you can to get your GPA up. Much more important for you to get As than to have a double major, which is a neglible soft.

I assume you are going to apply straight from UG -- you seem to have mediocre softs, but don't worry too much. If you are doing that well on the LSAT, you are in great shape.

Assuming you can pull your GPA up to 3.6ish, you'll need a 171/172 for NYU and a 173/174 for Columbia. You can do it. Just keep taking PTs, go over and analyze your answers, and if you haven't done the PowerScore Bibles yet, do those.

EDIT: And you still have a really long time before June. Don't do too much, time is on your side. I'd suggest spending a few hours a night really concentrating on it, rather than brutal six-hour sessions or something, and maybe one full-length PT a weekend. Take you time on each PT and get the most out of it, don't just bang out the questions.